Xinetd, bash script and reset connection

omcdr · 05-02-2012, 09:18 AM

I have simple bash script:

Code:

#!/bin/bash

if nc -w 3 -z 192.168.15.10 5532 <<< . &> /dev/null
 then
  echo 'Port is open'
  ssh -L 1523:127.0.0.1:1523 -gNnT -p 5532 192.168.15.10 &
fi
exit 0

Script is working, but with xinetd serwice:

Code:

service script
{
        disable         = no
        socket_type     = stream
        protocol        = tcp
        wait            = no
        user            = root
        server          = /root/script.sh
        log_on_success -= HOST
        log_on_failure += HOST
        instances = 1
}

script after telnet connection is hang up, I see echo characters in telnet console.

How to reset connection in xinetd service after script execution ? exit 0 not working.

em31amit · 05-02-2012, 09:54 AM

telnet to what ? you are using SSH session in script not telnet. information is not clear here!!!!

omcdr · 05-02-2012, 03:21 PM

Telnet to my xinetd service with bash script:

Code:

# netstat -ltnp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name
tcp        0      0 192.168.2.20:2001            0.0.0.0:*                   LISTEN      13756/xinetd
...


# telnet 192.168.2.20 2001
Trying 192.168.2.20...
Connected to 192.168.2.20 (192.168.2.20).
Escape character is '^]'.
Port is open

and telnet connection is still active.
How to break connection after script execution ?

In console mode script works 0.1 s

Code:

# time /root/script.sh
Port is open

real    0m0.129s
user    0m0.004s
sys     0m0.045s